One Pot Synthesis of γ‐Benzopyranones via Iron‐Catalyzed Aerobic Oxidation and Subsequent 4‐Dimethylaminopyridine Catalyzed 6‐endo Cyclization

One‐pot synthesis of γ‐benzopyranones was realized in decent yields and excellent regioselectivities via iron‐catalyzed aerobic oxidation and 4‐dimethylaminopyridine‐catalyzed cyclization of related propargylic alcohols. Derivatizations to aromatic substituted γ‐benzopyranones and synthesis of naturally occurring 3′,4′‐dimethoxyflavone have also been realized.